Total knee joint prostheses

Abstract

The invention provides a total knee joint prosthesis. The total knee joint prothesis comprises a femoral condyle prosthesis and a tibial pad prosthesis, and the femoral condyle prosthesis is installedon the tibial pad prosthesis; a patella groove is formed in an outer side of the femoral condyle prosthesis, and a femoral condyle articular surface is arranged at the bottom of the femoral condyle prosthesis; the depth of the patella groove extending downwards along the top of the outer side of the femoral condyle prosthesis is gradually increased; the femoral condyle prosthesis comprises a series of prostheses suitable for different crowds, and the femoral condyle articular surfaces of the series of prostheses are different in radius and center distance; a tibial pad prosthesis articular surface is arranged on the tibial pad prosthesis, the tibial pad prosthesis comprises a series of prostheses suitable for different crowds, and the tibial pad prosthesis articular surface are differentin radius and center distance; the contact area between the tibial pad prosthesis and the femoral condyle prosthesis is large, abrasion of pressure and polyethylene is reduced, and stability is high;the radiuses and the center distances of adjacent series of the femoral condyle prosthesis and the tibial pad prosthesis are similar, so that the shapes of articular surfaces of adjacent models are similar, and the probability of abrasion and looseness is reduced.

Description

technical field [0001] The invention relates to the field of knee joint prosthesis, in particular to a total knee joint prosthesis. Background technique [0002] Currently, the patella accounts for a large proportion of the postoperative adverse reactions of the existing artificial knee prosthesis, such as patella pain, patella snapping, and patella instability. The main reason is that the design of the prosthesis cannot meet individual differences. If the patellar trochlear groove is too wide, it may cause instability of the patella, while if the patella trochlear groove is too narrow, it may cause pain or insufficient flexion function of the patella. When the femoral condyle is matched with different types of tibial pad prosthesis, the arc of the femoral condyle and the tibial pad prosthesis often do not match very well. If such a poor fit of the femorotibial articular surface occurs, the wear of the tibial pad prosthesis relative to the femoral condyle will increase shar...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a total knee prosthesis, which is used to solve the problems of poor stability, easy wear and poor fit of the articular surface in the prior art when the prosthesis is implanted

Images